The fast-food buds of fast-growing poplars mainly include Mongolian weevil, big gray elephant weevil, black cashew beetle, Yangshan cynomolgus moth, Yang ului, and American white moth. They mainly infest new plantlets.
The prevention and control method is: In the germination period of seedlings, use 50% phoxim emulsion, Lethbene, Diflubenzuron and other insecticides to spray 1500 times to kill adult worms, or use phorate to spread soil around the seedlings. To repel pests.
The main pests of the stem borer are Yanggan elephant, Populus lycopoidea, Qingyang longhorn and Anoplophora glabripennis. Yang Ganxiang is mainly responsible for the 2 or 3 year old saplings. The prevention and control method is: In the middle and late April, dry the solution with 40% dimethoate, 50% chlorpyrifos, 50% phoxim, and 1% to 2% solution. Brush dry height is about 2 cm. The poplar is mainly responsible for the 1-year-old saplings from the end of June to the beginning of August. It is sprayed with 40% dimethoate emulsion, 50% chlorpyrifos, 50% phoxim emulsion, etc. from 1500 to 2000 times. 5 times, every 15 days or so, focus on spraying branches and main shoots. Or use aluminum phosphide tablets to seal the wormhole and kill the dry larvae. C. sinensis mainly damages trees larger than 4 years old. In the middle and late May, it sprays 80% trichlorfon, 50% dichlorvos, and 40% dimethoate 1000 to 1500 times liquids 1 to 2 times. Anoplophora glabripennis mainly damages trees aged 5 or 6 years. It can be controlled in the middle or late April. It drills on dry foundations and reaches deep into the medullary heart. Three to five milliliters of insecticide is injected into each plant, and the hole is sealed with mud.
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